BECKHOFF BC8000 - Manual (Page 22)

RS485 – Controller BC8000
22 BC8000
i
Note
When addresses 1..98 are selected the baud rate cannot be set. It is
identical to the default value.
Setting of station addresses Selection of station addresses is carried out using the rotary switches on the
left side of the bus terminal controller. The address is set as decimal
number. The upper rotary switch sets the units value and the low one the
tens value of the address. (Example: station address 18: lower rotary switch
= 1, upper rotary switch = 8). In order for the rotary switch setting to be
stored by the bus terminal controller, a reset of the bus terminal controller
must be carried out (brief interruption of the power supply or software reset).
Address selector
The Medium: Plugs and Cables
Cable connection is provided by a 9-pin D-sub plug on the left side of the
bus terminal controller. A two-conductor shielded cable can be used in which
the shield is bonded to the signal ground (GND).
1
6: 5 V
5: GND
3: RxD/TxD
8: RxD/TxD
With the BC8000 bus terminal controllers can connections be developed with
several participants, whereby the maximum length amounts to 1200m.
PC
TxD/RxD (3)
RxD/TxD (8)
BC8000
RxD/TxD (3)
TxD/RxD (8)
Shield
PE
Address
selector